A student drew pictures to show the differences between elements and compounds.
Which statement can the student support with her pictures?
A. An element exists in any state of matter, and a compound can only be in a solid state.
B. An element is very reactive, but a compound is always stable.
C. An element is made of a single type of atom, and a compound is made of two or more atoms.
D. An element contains multiple substances, and a compound contains only one atom.